Abstract
Single ore particles of various sizes were broken in an impact-breakage device at varying levels of impact energy. It is shown that an optimum impact energy can be determined for the breakage of an ore particle of a given size to a specified product size, and that the optimum usage of impact energy is often obtained by the use of a number of breakage steps for the size reduction of a particle. The optimum level of the impact energy is shown to be highly dependent on the size of the particle to be broken, and to be influenced by the size of the final product required and the efficiency of secondary breakage. The significance of these results in relation to the optimization of breakage events in grinding mills is discussed.
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